Any licensed Realtor or Title Company can provide this information to you for free. The first sign is called a Notice of Default which is filed on the property and the current owner, this is when the current mortgage has not been paid for at least 90 days, you can personally also check this at the county clerk recorders office. This does not mean the property will actually go into foreclosure, it just means the home is past due on the mortgage but it is one strong sign it might potentially go into foreclosure. All the way up to the day of the Auction Date the owner has the ability to bring their mortgage current and pull it out of foreclosure. They also could be trying to modify their current loan payment and if their current mortgage lender approves it and they adhere to those terms in the modification will be able to not have the property foreclosed on. I would definitely recommend finding out right away though, you do not want to continue paying rent to someone that is not paying their mortgage.